Descriptive Statistics for Data Science

Question 1

Question

In Descriptive statistics, you are describing, presenting, summarizing, and organizing your data, either through ______________.

Answer

Numerical Calculations
Graphs
Tables
All of them

Question 2

Question

Which of the following is a Measure of Central Tendency?

Answer

Mean
Median
Mode
All of them

Question 3

Question

Which of the following is less affected by outliers?

Answer

Mean
Median
Mode
None of them

Question 4

Question

Which of the following is not affected by outliers?

Answer

Mean
Median
Mode
None of them

Question 5

Question

Which of the following is a Measure of Variability?

Answer

Range & Interquartile range
Variance
Standard Deviation
All of them

Question 6

Question

The bigger the range of data the more ________it is?

Answer

Distributed
Undistributed
Left Skewed
RIght Skewed

Question 7

Question

Interquartile range (IQR) is the difference between _______.

Answer

Q1 - Q3
Q2 - Q3
Q3 - Q1
None of them

Question 8

Question

Range Measures_____________of the datapoint?

Answer

Beginning
End
Beginning and End
IQR

Question 9

Question

The interquartile range (IQR) is a Measure of data where___________.

Answer

Fewer values lie
The majority of values lie

Question 10

Question

Variance is the Average of______________from the mean.

Answer

Squared deviation
Square root of deviation

Question 11

Question

Standard deviation is _____________.

Answer

Square root of Variance
Square of Variance

Question 12

Question

When you have a low Standard deviation, your data points tend to be _________ the mean.

Answer

Far from
Close to

Question 13

Question

When you have a high standard deviation, your data points tend to be ________ the mean.

Answer

Far from
Close to

Question 14

Question

Normal Distribution is _____________.

Answer

Bell shaped
Left Skewed
RIght Skewed
None

Question 15

Question

Z-Score is used to check how many standard deviations away from the mean, a _________________lies.

Answer

Distribution of entire data
Specific data point in a data

Question 16

Question

Which of the following are the Terminologies of Probability?

Answer

Event, Outcome
Experiment, Probability
All of them
None of them

Question 17

Question

Bernoulli Trials have _________ outcomes.

Answer

Exactly one
Exactly two
Exactly three
Exactly four

Question 18

Question

The Binomial distribution is the Probability distribution of the number of successes in _________Bernoulli trials.

Answer

one
two
three
n

Question 19

Question

Probability Density Function is the Probability distribution of a ____________ random variable.

Answer

Continuous random variable
Discrete random variable

Question 20

Question

The area under a probability density function gives the probability for the __________ variable to be in that range.

Answer

Continuous random
Discrete random

Question 21

Question

Taking __________ samples of equal size from the data, the sample means are approximately normally distributed.

Answer

Random
Cluster
Stratified
Systematic

Question 22

Question

In a normal distribution the ________________.

Answer

Mean > Median > Mode
Mean = Median < Mode
Mean = Median = Mode
Mean < Median < Mode

Question 23

Question

Normal distribution with a mean _____ and a standard deviation of ____ is called a Standard Normal Distribution.

Answer

1,0
0,1
0,0
None of them

Question 24

Question

Central Limit Theorem states that: If we take means of random samples from a distribution and we plot the means, the graph approaches to a ___________distribution when we have taken a sufficiently large number of such samples.

Answer

Left Skewed
Right Skewed
Normal
None of them

Question 25

Question

The Central Limit Theorem also states that the mean of __________ means is approximately equal to the mean of __________means.

Answer

Population, Sample
Population
Sample
None

Question 26

Question

A positive Z score indicates that the observed value is Z standard deviations __________ mean. A negative Z score indicates the observed value is Z standard deviations ____________ mean.

Answer

Below, Above
Below
Above, Below
Above

Question 27

Question

______% of data lies within 1 standard deviation of the mean ______% of data lies within 2 standard deviations of the mean ______% of data lies within 3 standard deviations of the mean

Answer

68.27% 99.73% 95.45%
68.27% 95.45% 99.73%
99.73% 95.45% 68.27%
68.27% 95.45% 99.73%

Next up

Descriptive Statistics for Data Science

Description

Resource summary

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25

Question 26

Question 27

Similar

	Created by Vishakha Achmare over 3 years ago